Question

1. Describe the 3 levels of defense mechanisms.
2. Describe the importance of mast cells, complementary proteins and phagocytes in inflammatory response.
3. Why is the lymphatic system important for the immune system?

Answer 1

Importance of mast cells

importance of phagocytes

importance of complementary proteins

Importance of lymphatic system for immune system

It is an extensive drainage network that helps keep bodily fluid levels in balance and defends the body against infections. It is made up of a complex network of lymphoid organs, lymph nodes, lymph ducts, lymph tissues, lymph capillaries and a network of lymphatic vessels that carry lymph and other substances throughout the body.

One of the important functions of immune system is the production of immune cells (such as lymphocytes, monocytes, and antibody producing cells called plasma cells).

It is the first line of defense against disease. This network of vessels and nodes transports and filters lymph fluid containing antibodies and lymphocytes (good) and bacteria (bad). The body’s first contact with these invaders signals the lymphatics, calling upon this system to orchestrate the way the infection-fighting cells prevent illness and diseases from invading microorganisms. Spleen also helps the body fight infection. Spleen contains lymphocytes and another kind of white blood cell called macrophages, which engulf and destroy bacteria, dead tissue, and foreign matter and remove them from the blood passing through the spleen.Lymph fluid enters t into lymph nodes, where macrophages fight off foreign bodies like bacteria, removing them from the bloodstream. After these substances have been filtered out, the lymph fluid leaves the lymph nodes and returns to the veins, from where it re-enters the bloodstream.